74 



ECONOMICAL MINERALOGY. 



TABLE 



Showing the composition of various marbles and limestones found in the State of New-York, 

 with the proportion of pure lime and magnesia which they contain. 



No. I. 



il. 



III. 



IV. 



V. 



VI. 



VII. 



Vlll. 



Dover, Dutchess county. White or bluish white ; made up of small grains. Page 68. 

 Lockport, Niagara county, Greyish, compact; containing organic remains. Page 69. 



Rochester, Monroe county. Calciferous slate of Eaton ; gives out a bituminous odour when struck. Page 69. 

 Chittenango falls, Madison county. Grey crinoidal limestone. Page 69. 

 Split Rock quarry, Onondaga county. Grey, and similar to the preceding. Page 69. 

 Minischegongo creek, Rockland county. Dove-coloured, compact ; has a conchoidal fracture. Page 70. 

 Sing-Sing, Westchester county. White with dark spots, granular, and somewhat friable. Page 72. 

 Kane's quarry, Westchester county. White or bluish white, coarse grained, more compact than the preceding. 

 Page 73. 



Manufacture of Lime. 



The minerals which have just been treated of, are also of great value in consequence of 

 their use in the preparation of lime. Of tliis important article, the amount annually consumed 

 in this State must be enormous. This amount, moreover, must constantly increase, in con- 

 sequence of the new uses to which it is applied ; as for example, in agriculture, the prepara- 

 tion of chloride of lime, &c. 



The following remarks, from one of the Annual Reports of Dr. Charles T. Jackson on the 

 Geology of the State of Maine, will serve, to convey some idea of the value of this article : 



" Few perhaps realize the fact," says he, " that there are no less than fourteen millions of 

 dollars worth of limestone within twenty feet of the surface in Thomason ; and that abeady, 

 while but a trifling portion of the stone is exported, nearly half a million of dollars are annual- 

 ly realized from the sales of lime ; besides which, we have also to estimate the value of tHe 

 carrying trade, the whole business being in the hands of the citizens of Maine." " The lime," 

 the same gentleman remarks, " serves to supply nearly all the cities on the Atlantic coast with 

 the lime used in their buildings, and for agriculture."* 



Second Report on the Geology af the State of Maine, 1833. 



